Don't use StubType to probe the code caches.

src/stub-cache.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 65 matching lines @@
   };
 
   void Initialize();
 
   Handle<JSObject> StubHolder(Handle<JSObject> receiver,
                               Handle<JSObject> holder);
 
   Handle<Code> FindIC(Handle<Name> name,
                       Handle<Map> stub_holder_map,
                       Code::Kind kind,
-                      Code::StubType type,
                       Code::ExtraICState extra_state = Code::kNoExtraICState);
 
   Handle<Code> FindIC(Handle<Name> name,
                       Handle<JSObject> stub_holder,
                       Code::Kind kind,
-                      Code::StubType type,
                       Code::ExtraICState extra_state = Code::kNoExtraICState);
 
   Handle<Code> FindLoadHandler(Handle<Name> name,
                                Handle<JSObject> receiver,
-                               Code::Kind kind,
-                               Code::StubType type);
+                               Code::Kind kind);
 
   Handle<Code> FindStoreHandler(Handle<Name> name,
                                 Handle<JSObject> receiver,
                                 Code::Kind kind,
-                                Code::StubType type,
                                 StrictModeFlag strict_mode);
 
   Handle<Code> ComputeMonomorphicIC(Handle<HeapObject> receiver,
                                     Handle<Code> handler,
                                     Handle<Name> name,
                                     StrictModeFlag strict_mode);
 
   // Computes the right stub matching. Inserts the result in the
   // cache before returning.  This might compile a stub if needed.
   Handle<Code> ComputeLoadNonexistent(Handle<Name> name,
@@ skipping 1073 matching lines @@
   Handle<JSFunction> constant_function_;
   bool is_simple_api_call_;
   Handle<FunctionTemplateInfo> expected_receiver_type_;
   Handle<CallHandlerInfo> api_call_info_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_STUB_CACHE_H_